Lol. People are really losing focus and context.In one test. 8c 16t has a lot over 4c 8t.
People really like hyperbole in here.
IIRC Atkin sieve modulo operations are all by constants and so should be optimized away to faster operations by any decent compiler.From PassMark's website:
The Prime Number Test aims to test how fast the CPU can search for Prime numbers, reported as operations per second. A prime number is a number that can only be divided by itself and 1. For example, 1, 2, 3, 5, 7, 11 etc. This algorithm uses loops and CPU operations that are common in computer software, the most intensive being multiplication and modulo operations. All operations are performed using 64-bit integers. This test uses about 4MB of memory per core. The specific formula used for this test is the Sieve of Atkin with a limit of 32 million.
Emphasis mine. If these modulo operations are done using the DIV/IDIV opcodes, then it wouldn't be surprising to see them poorly optimized. These are very slow instructions even on modern Intel CPUs. I doubt that this would have been a high priority for AMD's development team, and it would not be likely to have a substantial impact on a wide variety of real-world software. Most applications that need high-speed division and modulus operations use various tricks to speed this up.
And you know he won't and can't answer that.I know. I also know that he knows. I also know that he knows the answer to my question.
Any thoughts on frequency and core count scaling?I made a chart using your data
Here's how the Ryzen chip fares against some other common CPUs—and I'll note that I've run PerformanceTest on my own systems here, with two options, stock and clocked at a static 3.4GHz (to match the Ryzen clock). (The AMD Ryzen, FX, and A10 results are from Passmark's database.)
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